as a final step.... yes... but there is a different process the machine shop uses to get it cleaned... once cleaned chemically, then it got glass beaded. and to make sure there was no glass beads left... the galley plugs were removed, the galleys cleaned, and the head threaded for thread in galley plugs

Eye spy a small nick on the edge of the combustion chamber... and a nice casting line that will be OST'd

oldeskewltoy wrote:and to make sure there was no glass beads left... the galley plugs were removed, the galleys cleaned, and the head threaded for thread in galley plugs

Is this standard work for all the heads you have cleaned there? I ask because I really like this idea. A Honda cylinder head I picked up had all its threaded plugs removed. Seems like a good idea especially for cleaning.

Is it possible (or recommended) to have the head coated, in a heat-shedding ceramic type coating?

How do valve seats even get like this? Before I rebuilt I know my engine was sitting in the POs shed for 2 years without being started..., but when I took it apart and looked at the head the seats weren't like this at all. Was this caused a blown HG? I'm just curious.

oldeskewltoy wrote:and to make sure there was no glass beads left... the galley plugs were removed, the galleys cleaned, and the head threaded for thread in galley plugs

Is this standard work for all the heads you have cleaned there? I ask because I really like this idea. A Honda cylinder head I picked up had all its threaded plugs removed. Seems like a good idea especially for cleaning.

Not all the heads have received this treatment, but many have.

Rogue-AE95 wrote:Is it possible (or recommended) to have the head coated, in a heat-shedding ceramic type coating?

The head it self.... I've seen a few with coatings on them... not sure how they work...... What I have heard that very well may work... is a ceramic coating in the exhaust bowls, and ports

mr2mk1hero wrote:How do valve seats even get like this? Before I rebuilt I know my engine was sitting in the POs shed for 2 years without being started..., but when I took it apart and looked at the head the seats weren't like this at all. Was this caused a blown HG? I'm just curious.

Water could very well have been sitting in this head... I'm just speculating... but from the condition I got it in, it would not surprise me if the head was @ a salvage yard sitting in a pile..........